Web Forms :: Select / Insert / Edit / Update Delete In DetailsView Control Without Database?

I have made a DetailsView which in DetailsView there is action to add the data, change data and delete the data ..how to save, change, delete data, which is in the DetailsView without saving it in the database?so far I use viewstate, but I do not know how to apply it in DetailsView ..

how to create insert , update , delete . in detailsview without saving in database  ..

private void Bindemptydt() {
//Declare a datatable for the gridview
DataTable dt = new DataTable();
//Add Columns to the datatable
dt.Columns.Add("report_id");
dt.Columns.Add("param_field");
dt.Columns.Add("param_label");

[code]....